 <ul class="nav nav-tabs" style="margin-left: -1px;">
    <li>
      <a href="{:U('score')}" class="nav_score">学生积分</a>
    </li>
    <li>
      <a href="{:U('scoredec')}" class="nav_scoredec">扣分登记</a>
    </li>
    <li>
      <a href="{:U('scoreinc')}" class="nav_scoreinc">加分登记</a>
    </li>
<!--     <li>
      <a href="{:U('addexp')}" class="nav_addexp">奖惩内容</a>
    </li> -->
    <li>
      <a href="{:U('score_asc')}" class="nav_score_asc">积分排行榜</a>
    </li>
  </ul>
 <script>
    $(function () {
        $('.nav_' + "{$now_tab}").parent().addClass('active');
    });
</script>